Normal users can do this, the
Normal users can do this, the sensor is accessable from the front grille. Take it out and replace it with a resistor. The bigger the resistor the colder the temperature is detected. Find what works and keep it in there. Done.
With short trips this will help enormously on efficiency. The battery can supply electric heat through the vents, to the battery and to the seats if the car has that feature.
This is not hypothetical, it has been proven. Engine will not come on due to temperature if it thinks it is warm outside, via the ambient temperature sensor signal.